/*
* call-seq:
* Message.to_h => {}
*
* Returns the message as a Ruby Hash object, with keys as symbols.
*/
VALUE Message_to_h(VALUE _self) {
MessageHeader* self;
VALUE hash;
upb_msg_field_iter it;
TypedData_Get_Struct(_self, MessageHeader, &Message_type, self);
hash = rb_hash_new();
for (upb_msg_field_begin(&it, self->descriptor->msgdef);
!upb_msg_field_done(&it);
upb_msg_field_next(&it)) {
const upb_fielddef* field = upb_msg_iter_field(&it);
// For proto2, do not include fields which are not set.
if (upb_msgdef_syntax(self->descriptor->msgdef) == UPB_SYNTAX_PROTO2 &&
field_contains_hasbit(self->descriptor->layout, field) &&
!layout_has(self->descriptor->layout, Message_data(self), field)) {
continue;
}
VALUE msg_value = layout_get(self->descriptor->layout, Message_data(self),
field);
VALUE msg_key = ID2SYM(rb_intern(upb_fielddef_name(field)));
if (is_map_field(field)) {
msg_value = Map_to_h(msg_value);
} else if (upb_fielddef_label(field) == UPB_LABEL_REPEATED) {
msg_value = RepeatedField_to_ary(msg_value);
if (upb_msgdef_syntax(self->descriptor->msgdef) == UPB_SYNTAX_PROTO2 &&
RARRAY_LEN(msg_value) == 0) {
continue;
}
if (upb_fielddef_type(field) == UPB_TYPE_MESSAGE) {
for (int i = 0; i < RARRAY_LEN(msg_value); i++) {
VALUE elem = rb_ary_entry(msg_value, i);
rb_ary_store(msg_value, i, Message_to_h(elem));
}
}
} else if (msg_value != Qnil &&
upb_fielddef_type(field) == UPB_TYPE_MESSAGE) {
msg_value = Message_to_h(msg_value);
}
rb_hash_aset(hash, msg_key, msg_value);
}
return hash;
}
bool is_map_field(const upb_fielddef *field) {
const upb_msgdef* subdef = tryget_map_entry_msgdef(field);
if (subdef == NULL) return false;
// Map fields are a proto3 feature.
// If we're using proto2 syntax we need to fallback to the repeated field.
return upb_msgdef_syntax(subdef) == UPB_SYNTAX_PROTO3;
}
